Item Response Warehouse

The Item Response Warehouse (IRW) is a collection of open, harmonized item response datasets.

These datasets in IRW span a wide range of measures; examples include measures of ability in education settings, measures of partisanship based on voting records, and personality measures based on survey questions. While they span a wide range of measures, the data are harmonized in a common format to allow for standardized analysis of larger quantities of data. The key element required of data for inclusion in the IRW is that the data need to report individual responses that are cross-classified by the focus of measurement (typically a person) and the measurement tool (typically an item). Responses can be scored in a variety of ways (dichotomous, polytomous, continuous) and may contain additional data (e.g., response time), but the cross-classification aspect is fundamental.

Metadata

Examine sample sizes and other dataset summary statistics.

Individual datasets

Explore each dataset’s distribution of mean responses by item and by subject.